adding the some preliminary junk

[gitmo/Class-C3-XS.git] / t / 31_next_method_skip.t

diff --git a/t/31_next_method_skip.t b/t/31_next_method_skip.t
new file mode 100644 (file)
index 0000000..7af8035
--- /dev/null
+++ b/t/31_next_method_skip.t
@@ -0,0 +1,85 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+
+use Test::More tests => 11;
+
+BEGIN {
+    use lib 'opt', '../opt', '..';    
+    use_ok('c3');
+    # uncomment this line, and re-run the
+    # test to see the normal p5 dispatch order
+    #$Class::C3::TURN_OFF_C3 = 1;    
+}
+
+=pod
+
+This tests the classic diamond inheritence pattern.
+
+   <A>
+  /   \
+<B>   <C>
+  \   /
+   <D>
+
+=cut
+
+{
+    package Diamond_A;
+    use c3; 
+    sub bar { 'Diamond_A::bar' }        
+    sub baz { 'Diamond_A::baz' }
+}
+{
+    package Diamond_B;
+    use base 'Diamond_A';
+    use c3;    
+    sub baz { 'Diamond_B::baz => ' . (shift)->next::method() }         
+}
+{
+    package Diamond_C;
+    use c3;    
+    use base 'Diamond_A';     
+    sub foo { 'Diamond_C::foo' }   
+    sub buz { 'Diamond_C::buz' }     
+    
+    sub woz { 'Diamond_C::woz' }
+    sub maybe { 'Diamond_C::maybe' }         
+}
+{
+    package Diamond_D;
+    use base ('Diamond_B', 'Diamond_C');
+    use c3; 
+    sub foo { 'Diamond_D::foo => ' . (shift)->next::method() } 
+    sub bar { 'Diamond_D::bar => ' . (shift)->next::method() }   
+    sub buz { 'Diamond_D::buz => ' . (shift)->baz() }  
+    sub fuz { 'Diamond_D::fuz => ' . (shift)->next::method() }  
+    
+    sub woz { 'Diamond_D::woz can => ' . ((shift)->next::can() ? 1 : 0) }
+    sub noz { 'Diamond_D::noz can => ' . ((shift)->next::can() ? 1 : 0) }
+
+    sub maybe { 'Diamond_D::maybe => ' . ((shift)->maybe::next::method() || 0) }
+    sub moybe { 'Diamond_D::moybe => ' . ((shift)->maybe::next::method() || 0) }             
+
+}
+
+Class::C3::initialize();
+
+is_deeply(
+    [ Class::C3::calculateMRO('Diamond_D') ],
+    [ qw(Diamond_D Diamond_B Diamond_C Diamond_A) ],
+    '... got the right MRO for Diamond_D');
+
+is(Diamond_D->foo, 'Diamond_D::foo => Diamond_C::foo', '... skipped B and went to C correctly');
+is(Diamond_D->bar, 'Diamond_D::bar => Diamond_A::bar', '... skipped B & C and went to A correctly');
+is(Diamond_D->baz, 'Diamond_B::baz => Diamond_A::baz', '... called B method, skipped C and went to A correctly');
+is(Diamond_D->buz, 'Diamond_D::buz => Diamond_B::baz => Diamond_A::baz', '... called D method dispatched to , different method correctly');
+eval { Diamond_D->fuz };
+like($@, qr/^No next::method 'fuz' found for Diamond_D/, '... cannot re-dispatch to a method which is not there');
+
+is(Diamond_D->woz, 'Diamond_D::woz can => 1', '... can re-dispatch figured out correctly');
+is(Diamond_D->noz, 'Diamond_D::noz can => 0', '... cannot re-dispatch figured out correctly');
+
+is(Diamond_D->maybe, 'Diamond_D::maybe => Diamond_C::maybe', '... redispatched D to C when it exists');
+is(Diamond_D->moybe, 'Diamond_D::moybe => 0', '... quietly failed redispatch from D');